Stratotype Point Base of Maastrichtian Location of Stratotype Point Base of Maastrichtian Base of Maastrichtian Stratotype Point Base of Maastrichtian Ratified 2001 true Tercis les Bains, Landes, France Episodes 24/4, p. 229 238, 2001 Mean of 12 biostratigraphic criteria of equal importance. Closely above is FAD of ammonite Pachydiscus neubergicus. Boreal proxy is FAD of belemnite Belemnella lanceolata. level 115.2 on platform IV of the geological site at Tercis les Bains